Question:
Evaluate:
i. $\int\left(\frac{x^{2}-1}{x^{2}+1}\right) d x$
ii. $\int\left(\frac{x^{6}-1}{x^{2}+1}\right) d x$
iii. $\int\left(\frac{x^{4}}{1+x^{2}}\right) d x$
iv. $\int\left(\frac{x^{2}}{1+x^{2}}\right) d x$
Solution:
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